diff options
| author | Quinn Tran <qutran@marvell.com> | 2022-12-19 03:07:41 -0800 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2023-01-11 21:28:37 -0500 |
| commit | 41e5afe51f75f2858f5563145348f6c26d307b8f (patch) | |
| tree | 7d7ada02cd9e0ea31e985ec9d1e605bdc3d2311a /drivers/scsi/qla2xxx/qla_edif.c | |
| parent | c75e6aef5039830cce5d4cf764dd204522f89e6b (diff) | |
scsi: qla2xxx: Fix exchange oversubscription
In large environment, it is possible to experience command timeout and
escalation of path recovery. Currently the driver does not track the number
of exchanges/commands sent to FW. If there is a delay for commands at the
head of the queue, then this will create back pressure for commands at the
back of the queue.
Check for exchange availability before command submission.
Fixes: 89c72f4245a8 ("scsi: qla2xxx: Add IOCB resource tracking")
Signed-off-by: Quinn Tran <qutran@marvell.com>
Signed-off-by: Nilesh Javali <njavali@marvell.com>
Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/scsi/qla2xxx/qla_edif.c')
| -rw-r--r-- | drivers/scsi/qla2xxx/qla_edif.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/drivers/scsi/qla2xxx/qla_edif.c b/drivers/scsi/qla2xxx/qla_edif.c index e4240aae5f9e..53186a145962 100644 --- a/drivers/scsi/qla2xxx/qla_edif.c +++ b/drivers/scsi/qla2xxx/qla_edif.c @@ -2989,9 +2989,10 @@ qla28xx_start_scsi_edif(srb_t *sp) tot_dsds = nseg; req_cnt = qla24xx_calc_iocbs(vha, tot_dsds); - sp->iores.res_type = RESOURCE_INI; + sp->iores.res_type = RESOURCE_IOCB | RESOURCE_EXCH; + sp->iores.exch_cnt = 1; sp->iores.iocb_cnt = req_cnt; - if (qla_get_iocbs(sp->qpair, &sp->iores)) + if (qla_get_fw_resources(sp->qpair, &sp->iores)) goto queuing_error; if (req->cnt < (req_cnt + 2)) { @@ -3185,7 +3186,7 @@ queuing_error: mempool_free(sp->u.scmd.ct6_ctx, ha->ctx_mempool); sp->u.scmd.ct6_ctx = NULL; } - qla_put_iocbs(sp->qpair, &sp->iores); + qla_put_fw_resources(sp->qpair, &sp->iores); spin_unlock_irqrestore(lock, flags); return QLA_FUNCTION_FAILED; |